Computer School Blues

Ninth Grade test scores are released and Amy Anderson once again scores the highest. Melvin points her out to Serena. Amy is a shy, lonely girl who spends all her time studying and preparing for college to be a doctor. Serena befriends her, hoping to con Amy into doing her homework for her. However, Luna senses a power in Amy and suspects she's an agent of the Negaverse. Amy initially impresses Serena and the others at the video arcade with her video game prowess, something Serena lacks, but suddenly rushes off to her college prep class. She drops a computer disk that Serena finds. Luna plays it and finds a brainwashing program on it. She and Sailor Moon head for the prep class and discover it's another front for Jadeite. The students have fallen victim to him and Amy is next. While Sailor Moon fights Jadeite's monster, Luna spots a mark appear on Amy's forehead, signaling that she's actually Sailor Mercury. Luna tells her how to transform and how to launch her attack, a dense fog called "Mercury Bubble Blast". With the monster blinded, Sailor Moon destroys it with her tiara and the two girls each find they've gained a new friend and ally.

Serena Tsukino/Sailor Moon, Luna, Amy Anderson/Sailor Mercury, Molly, Melvin, Andrew, Darien/Tuxedo Mask, Queen Beryl, Jadeite

This is English episode 5.